--- /dev/null
+
+/*
+ * Hauppauge HD PVR USB driver
+ *
+ * Copyright (C) 2008 Janne Grunau (j@jannau.net)
+ *
+ * IR device registration code is
+ * Copyright (C) 2010 Andy Walls <awalls@md.metrocast.net>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation, version 2.
+ *
+ */
+
+#if IS_ENABLED(CONFIG_I2C)
+
+#include <linux/i2c.h>
+#include <linux/slab.h>
+#include <linux/export.h>
+
+#include "hdpvr.h"
+
+#define CTRL_READ_REQUEST 0xb8
+#define CTRL_WRITE_REQUEST 0x38
+
+#define REQTYPE_I2C_READ 0xb1
+#define REQTYPE_I2C_WRITE 0xb0
+#define REQTYPE_I2C_WRITE_STATT 0xd0
+
+#define Z8F0811_IR_TX_I2C_ADDR 0x70
+#define Z8F0811_IR_RX_I2C_ADDR 0x71
+
+
+struct i2c_client *hdpvr_register_ir_tx_i2c(struct hdpvr_device *dev)
+{
+ struct IR_i2c_init_data *init_data = &dev->ir_i2c_init_data;
+ struct i2c_board_info hdpvr_ir_tx_i2c_board_info = {
+ I2C_BOARD_INFO("ir_tx_z8f0811_hdpvr", Z8F0811_IR_TX_I2C_ADDR),
+ };
+
+ init_data->name = "HD-PVR";
+ hdpvr_ir_tx_i2c_board_info.platform_data = init_data;
+
+ return i2c_new_device(&dev->i2c_adapter, &hdpvr_ir_tx_i2c_board_info);
+}
+
+struct i2c_client *hdpvr_register_ir_rx_i2c(struct hdpvr_device *dev)
+{
+ struct IR_i2c_init_data *init_data = &dev->ir_i2c_init_data;
+ struct i2c_board_info hdpvr_ir_rx_i2c_board_info = {
+ I2C_BOARD_INFO("ir_rx_z8f0811_hdpvr", Z8F0811_IR_RX_I2C_ADDR),
+ };
+
+ /* Our default information for ir-kbd-i2c.c to use */
+ init_data->ir_codes = RC_MAP_HAUPPAUGE;
+ init_data->internal_get_key_func = IR_KBD_GET_KEY_HAUP_XVR;
+ init_data->type = RC_BIT_RC5;
+ init_data->name = "HD-PVR";
+ init_data->polling_interval = 405; /* ms, duplicated from Windows */
+ hdpvr_ir_rx_i2c_board_info.platform_data = init_data;
+
+ return i2c_new_device(&dev->i2c_adapter, &hdpvr_ir_rx_i2c_board_info);
+}
+
+static int hdpvr_i2c_read(struct hdpvr_device *dev, int bus,
+ unsigned char addr, char *wdata, int wlen,
+ char *data, int len)
+{
+ int ret;
+
+ if ((len > sizeof(dev->i2c_buf)) || (wlen > sizeof(dev->i2c_buf)))
+ return -EINVAL;
+
+ if (wlen) {
+ memcpy(&dev->i2c_buf, wdata, wlen);
+ ret = usb_control_msg(dev->udev, usb_sndctrlpipe(dev->udev, 0),
+ REQTYPE_I2C_WRITE, CTRL_WRITE_REQUEST,
+ (bus << 8) | addr, 0, &dev->i2c_buf,
+ wlen, 1000);
+ if (ret < 0)
+ return ret;
+ }
+
+ ret = usb_control_msg(dev->udev, usb_rcvctrlpipe(dev->udev, 0),
+ REQTYPE_I2C_READ, CTRL_READ_REQUEST,
+ (bus << 8) | addr, 0, &dev->i2c_buf, len, 1000);
+
+ if (ret == len) {
+ memcpy(data, &dev->i2c_buf, len);
+ ret = 0;
+ } else if (ret >= 0)
+ ret = -EIO;
+
+ return ret;
+}
+
+static int hdpvr_i2c_write(struct hdpvr_device *dev, int bus,
+ unsigned char addr, char *data, int len)
+{
+ int ret;
+
+ if (len > sizeof(dev->i2c_buf))
+ return -EINVAL;
+
+ memcpy(&dev->i2c_buf, data, len);
+ ret = usb_control_msg(dev->udev, usb_sndctrlpipe(dev->udev, 0),
+ REQTYPE_I2C_WRITE, CTRL_WRITE_REQUEST,
+ (bus << 8) | addr, 0, &dev->i2c_buf, len, 1000);
+
+ if (ret < 0)
+ return ret;
+
+ ret = usb_control_msg(dev->udev, usb_rcvctrlpipe(dev->udev, 0),
+ REQTYPE_I2C_WRITE_STATT, CTRL_READ_REQUEST,
+ 0, 0, &dev->i2c_buf, 2, 1000);
+
+ if ((ret == 2) && (dev->i2c_buf[1] == (len - 1)))
+ ret = 0;
+ else if (ret >= 0)
+ ret = -EIO;
+
+ return ret;
+}
+
+static int hdpvr_transfer(struct i2c_adapter *i2c_adapter, struct i2c_msg *msgs,
+ int num)
+{
+ struct hdpvr_device *dev = i2c_get_adapdata(i2c_adapter);
+ int retval = 0, addr;
+
+ if (num <= 0)
+ return 0;
+
+ mutex_lock(&dev->i2c_mutex);
+
+ addr = msgs[0].addr << 1;
+
+ if (num == 1) {
+ if (msgs[0].flags & I2C_M_RD)
+ retval = hdpvr_i2c_read(dev, 1, addr, NULL, 0,
+ msgs[0].buf, msgs[0].len);
+ else
+ retval = hdpvr_i2c_write(dev, 1, addr, msgs[0].buf,
+ msgs[0].len);
+ } else if (num == 2) {
+ if (msgs[0].addr != msgs[1].addr) {
+ v4l2_warn(&dev->v4l2_dev, "refusing 2-phase i2c xfer "
+ "with conflicting target addresses\n");
+ retval = -EINVAL;
+ goto out;
+ }
+
+ if ((msgs[0].flags & I2C_M_RD) || !(msgs[1].flags & I2C_M_RD)) {
+ v4l2_warn(&dev->v4l2_dev, "refusing complex xfer with "
+ "r0=%d, r1=%d\n", msgs[0].flags & I2C_M_RD,
+ msgs[1].flags & I2C_M_RD);
+ retval = -EINVAL;
+ goto out;
+ }
+
+ /*
+ * Write followed by atomic read is the only complex xfer that
+ * we actually support here.
+ */
+ retval = hdpvr_i2c_read(dev, 1, addr, msgs[0].buf, msgs[0].len,
+ msgs[1].buf, msgs[1].len);
+ } else {
+ v4l2_warn(&dev->v4l2_dev, "refusing %d-phase i2c xfer\n", num);
+ }
+
+out:
+ mutex_unlock(&dev->i2c_mutex);
+
+ return retval ? retval : num;
+}
+
+static u32 hdpvr_functionality(struct i2c_adapter *adapter)
+{
+ return I2C_FUNC_I2C | I2C_FUNC_SMBUS_EMUL;
+}
+
+static struct i2c_algorithm hdpvr_algo = {
+ .master_xfer = hdpvr_transfer,
+ .functionality = hdpvr_functionality,
+};
+
+static struct i2c_adapter hdpvr_i2c_adapter_template = {
+ .name = "Hauppage HD PVR I2C",
+ .owner = THIS_MODULE,
+ .algo = &hdpvr_algo,
+};
+
+static int hdpvr_activate_ir(struct hdpvr_device *dev)
+{
+ char buffer[2];
+
+ mutex_lock(&dev->i2c_mutex);
+
+ hdpvr_i2c_read(dev, 0, 0x54, NULL, 0, buffer, 1);
+
+ buffer[0] = 0;
+ buffer[1] = 0x8;
+ hdpvr_i2c_write(dev, 1, 0x54, buffer, 2);
+
+ buffer[1] = 0x18;
+ hdpvr_i2c_write(dev, 1, 0x54, buffer, 2);
+
+ mutex_unlock(&dev->i2c_mutex);
+
+ return 0;
+}
+
+int hdpvr_register_i2c_adapter(struct hdpvr_device *dev)
+{
+ int retval = -ENOMEM;
+
+ hdpvr_activate_ir(dev);
+
+ dev->i2c_adapter = hdpvr_i2c_adapter_template;
+ dev->i2c_adapter.dev.parent = &dev->udev->dev;
+
+ i2c_set_adapdata(&dev->i2c_adapter, dev);
+
+ retval = i2c_add_adapter(&dev->i2c_adapter);
+
+ return retval;
+}
+
+#endif
Code Review / kvmfornfv.git / blobdiff